Mathématiques & Statistiques

Calculatrice algébrique gratuite — résolvez des équations linéaires et quadratiques, simplifiez des expressions, factorisez des polynômes, développez des expressions et résolvez des systèmes d'équations 2x2 avec des solutions étape par étape.

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Free Area Calculator supporting 19 shapes — Square, Rectangle, Triangle (6 methods), Circle, Ellipse, Sector, Trapezoid, Parallelogram, Rhombus, Kite, Regular Polygon, Pentagon, Hexagon, Octagon, Annulus, Semicircle, Circle Segment, Rectangular Border, and Irregular Quadrilateral. Instant results with formula display, perimeter, and unit conversions.

Calculateur de Moyenne Gratuit — calculez la moyenne arithmétique, la médiane, le mode, l'étendue, l'écart type, la moyenne géométrique, la moyenne harmonique, et plus encore à partir de n'importe quel ensemble de nombres. Prend en charge les modes de moyenne simple et pondérée.

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Free Confusion Matrix Calculator — compute accuracy, precision, recall, F1 score, MCC, Cohen's Kappa, specificity, and 15+ classification metrics from TP, FP, TN, FN inputs. Supports binary and multi-class modes.

Free Statistical Process Control (SPC) Control Chart Calculator — supports I-MR, X-bar R, X-bar S, P, NP, C, and U charts with UCL, LCL, Nelson run rule detection, and process capability (Cp, Cpk).

Free Process Capability Index (Cpk, Cp, Pp, Ppk) calculator for manufacturing and quality control. Calculate capability indices from summary statistics or raw data, with DPMO, sigma level, and yield outputs.

Free Derivative Calculator with step-by-step solutions. Compute first, second, and higher-order derivatives of polynomials, trigonometric, exponential, logarithmic, and composite functions instantly.

Résolveur d'équations gratuit — résolvez des équations linéaires, quadratiques et des systèmes d'équations étape par étape avec analyse du discriminant, formes factorisées et vérifications des solutions.

Free F1 Score Calculator — compute F1 score, precision, recall, accuracy, specificity, MCC, and more from a confusion matrix or direct precision/recall inputs. Supports F-beta, macro/micro/weighted averaging for multi-class models.

Free Greatest Common Factor (GCF) calculator — also known as GCD or HCF. Find the GCF of 2 to 10 numbers instantly with step-by-step solutions using Euclidean algorithm, prime factorization, or listing factors.

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Free Integral Calculator — compute indefinite and definite integrals with step-by-step solutions, Riemann sum approximations, and interactive area-under-curve charts for polynomials, trigonometric, exponential, and logarithmic functions.

Free Least Common Multiple (LCM) Calculator — find the LCM of 2 to 10 integers instantly with step-by-step solutions using prime factorization, GCF method, or listing multiples.

Free Logarithm (Log) Calculator — compute log base 10, natural log (ln), binary log (log2), antilog, change of base, and solve for any logarithm variable with step-by-step solutions and real-world examples.

Free Logarithm Calculator — compute log, antilog, natural log, binary log, and custom-base logarithms. Solve log equations, generate log tables, and explore scientific applications like pH, decibels, Richter scale, and doubling time.

Calculateur de Matrices en ligne gratuit pour l'addition, la soustraction, la multiplication, le déterminant, l'inverse, la transposition, les valeurs propres, la RREF, la décomposition LU et la résolution de systèmes linéaires — tout calculé instantanément dans votre navigateur.

Free Matrix Multiplication Calculator — multiply two or more matrices step by step, with color-coded dot product breakdowns, heatmap visualization, and LaTeX/CSV export. Supports A×B, A^n, scalar multiplication, and chained A×B×C.

Free medical test probability calculator using Bayes' theorem — compute post-test probability, PPV, NPV, likelihood ratios, and more from sensitivity, specificity, and prevalence.

Free Online Calculator with basic and scientific modes — perform arithmetic, trigonometry, logarithms, memory functions, and more directly in your browser.